This is another Z80 luggable machine from the 1980's. Its less powerful but essentially similar sibling is the more common Kontron PSI80. Both machines are expandable through ECB cards, the PSI98 has six slots.

My machines boots KOS and a disk made from the CP/M image, although it's clearly marked for the PSI80 - according to the documentation however, the PSI80 doesn't have the right disk drives for that endeavour.